Masithethe ngeMIM. Metal Isitofu Molding. Ukuba ujikeleze ukwenza ixesha elide ngokwaneleyo, uvile i-pitch: Kufana nokubumba inaliti yeplastiki, kodwa yentsimbi! Lo ngumgca wencwadana ekhazimlayo, lowo uthengisa oomatshini kwaye wenze abaphathi babe nemincili. Inyani, ukugaya imihla ngemihla kuyo, kubi kakhulu, kuninzi kakhulu, kwaye ngokunyanisekileyo, kunomdla ngakumbi. Ayingomlingo. Ngumdaniso ocokisekileyo womgubo, ipholima, ubushushu, kunye noxinzelelo, kwaye umsantsa phakathi kweprototype esebenzayo kunye nemveliso enemveliso ephezulu kulapho ufumana khona imivimbo yakho. Iivenkile ezininzi kakhulu zitsibela ekucingeni ukuba lutshintshiselwano oluthe ngqo lotyalo-mali okanye umatshini we-CNC, kwaye kulapho ibhetshi yokuqala ebiza kakhulu, i-sintered scrap ivela khona.
I-Feedstock Conundrum: Yonke iqala ngeGranule
Intliziyo yeMIM ayingomatshini wokubumba; kukutya kwemfuyo. Loo mxube odibeneyo we-ultra-fine metal powder kunye ne-multi-component binder system. Ndibone iiprojekthi zimile apha. Awukwazi nje ukubamba i-316L yomgubo kunye ne-generic wax-polymer binder kwaye ulindele impumelelo. Ukusabalalisa ubungakanani be-particle, imilo, umxholo we-oksijini-ichaza ubuninzi bokugqibela be-sintered kunye nokuzinza kwe-dimensional. Iqabane elifana neQingdao Qiangsenyuan Technology (QSY) lifumana oku. Ngemvelaphi yabo enzulu kwi-investment casting kunye ne-alloys, bayaqonda ukuziphatha kwezinto eziphathekayo phantsi kobushushu. Xa befumana ukutya kwenxalenye yezonyango ye-cobalt-chrome, abathengi nje imveliso; bavavanya impendulo yayo yokubophelela kunye ne-sintering ngokusekwe kumashumi eminyaka yokuphatha iialloyi ezikhethekileyo ezifanayo.
Kwaye isibophelelo? Sikafulawa sethutyana. Umsebenzi wayo kukuhamba kakuhle ngexesha lokutofa, emva koko unyamalale ngokupheleleyo ngaphandle kokuphazamisa indawo emdaka ebuthathaka. Ukukhetha engalunganga kukhokelela kwiziphene eziyintlekele: amadyungudyungu, ukuwohloka, okanye ukuqhekeka okuyintlekele ngexesha lokuvalwa kwe-thermal. Yiresiphi oyilungisayo iminyaka. I MIM inkqubo ayixoleli apha-i-0.5% ukutenxa kwi-binder formulation ingalahla yonke i-furnace load.
Sifunde oku ngendlela enzima kwi-aerospace sensor housing. Ijometri yayintsonkothile, inodonga olucekethekileyo. Umnikezeli wethu wesondlo esikumgangatho wokuqala usiqinisekisile isibophelelo sabo esisemgangathweni jikelele. Amalungu abunjiweyo abukeka egqibeleleyo. Emva koko, kwinqanaba le-catalytic debinding, badumba okwepopcorn. I-kinetics yokususa isibophelelo ibingalunganga kwinxalenye yethu enqamlezileyo. Kwafuneka sibuyele umva, sisebenze nengcali ukulungisa inkqubo. Leyo yindleko efihliweyo. Okwenyani MIM ubuchwephesha buhlala buhlala kwezi nuances zesayensi, hayi ekusebenzeni koshicilelo.
Ukubumba: Apho iPlastiki idibana nentsimbi (kwaye Iingxaki ziqala)
Kulungile, usifumene isondlo sakho. Ngoku uyalitofa. Oku kuvakala kuqhelekile nakweyiphi na imbumbi yeplastiki, kodwa inomahluko obalulekileyo. I-viscosity enyibilikayo iphezulu, ivakalelwa ngakumbi kwiqondo lokushisa. Ulwa nokwahlukana komgubo we-powder (iphupha elibi elibizwa ngokuba yi-slumping) ukuba iiparamitha zicimile. I-tooling kufuneka iphendule ngokuphezulu kakhulu, kunye ne-uniform, i-shrinkage kamva-ngokuqhelekileyo i-15-20%, kungekhona i-0.5% oyicwangcisayo kwiplastiki okanye kwi-machining.
Uyilo lwesango lubalulekile. Udinga ikhefu elicocekileyo, kodwa izinto eziphathekayo zi-abrasive. Ndibone ukungunda kwentsimbi kuguga ngokukhawuleza MIM feedstock kunenayiloni ezaliswe yiglasi. Ukukhupha umoya lelinye irhamncwa. Umoya ovalelweyo awubangeli nje isiphene sokuthambisa; inokudala ingxinano yethambeka eba yindawo yokuqaliswa kokuqhekeka emva kokuntywila. Yinkqubo encinci ye-handoffs apho izinto ziwa khona. Indawo ebunjiwe ngokugqibeleleyo yinxalenye eluhlaza nje, egcwele isibophelelo. Inamandla eshizi eqinile. Ukuyiphatha kufuna iiracks ezithile kunye neetreyi; udluliselo olunye olunzima kwaye ufumana isiphene seminwe esibonisa kuphela i-post-sinter.
Apha kulapho iivenkile ezihlanganisiweyo zinomphetho. Jonga ukuseta kweQSY (https://www.tsingtaocnc.com). Abayiyo nje a MIM indlu. Bane-casting kunye ne-CNC machining endlini. Kutheni ibalulekile nje loo nto? Kuba banokuyila ukungunda kunye nokugqwetheka kwe-sintering kunye nenjongo yokugqibela ye-net-shape engqondweni ukususela kusuku lokuqala. Baqonda ii-engile zokuyila, ukuguquguquka kobunzima bodonga, kunye nokugxininiswa koxinzelelo ukusuka kumbono wokwenza isinyithi, hayi nje ukubumba iplastiki. Iqela labo le-CNC linokwenza umatshini wokufaka umngundo kunyamezelo olugqithisileyo olufunekayo, kwaye kamva, lenze umatshini wesibini kwinxalenye ye-sintered ukuba into ebalulekileyo iyayifuna. Oko kudityaniswa ngokuthe nkqo kunciphisa umdlalo onetyala phakathi kokubumba, ukucofa, kunye noomatshini bokuthengisa.
Ukuhamba Okude, Okucothayo Kwiziko
Sintering. Isigaba sokwenza okanye sokuqhawula. Kulapho i-binder isuswa khona kwaye amasuntswana esinyithi adibanisa. Ngumjikelo we-thermal weentsuku ezinde, hayi ukubhaka okukhawulezayo. Ukubophelela kuqala, kancinci, ukunqanda ukwakhiwa koxinzelelo ngaphakathi kwendawo. Emva koko iqondo lobushushu liyanyuka ukuya kufutshane nendawo yokunyibilika kwesinyithi. Ulawulo lwe-atmosphere yinto yonke. Ukuvuza okuncinci okuzisa ioksijini kunokonakalisa indawo yakho yentsimbi engenasiphene, yonakalisa ukuxhathisa kwayo kukudleka. Kwii-alloys ezisebenzayo ezifana ne-titanium okanye ezinye ii-nickel-based superalloys, i-atmosphere yesithando somlilo kufuneka ibe yi-vacuum ecocekileyo okanye i-argon elawulwa kakhulu.
Amalungu ahlala kwiiseti ze-ceramic, ezimele zibe flat ngokugqibeleleyo kwaye zihambelane neekhemikhali. Ndikhumbula ibhetshi yeeseta ze-alumina ezazinongcoliseko oluncinci lomphezulu. Kwiqondo lokushisa eliphezulu, basabela kunye neengxenye ze-Inconel, bewelding kwi-setter. Ilahleko iyonke. Iprofayili yesithando somlilo-imilinganiselo yerampu, amaxesha e-soak-kufuneka iphuhliswe inxalenye nganye yejometri kunye ne-alloy. Icandelo elishinyeneyo kunye necandelo elibhityileyo kwinqanaba elifanayo liya kuntywila ngamaxabiso ahlukeneyo, kubangele i-warpage. Uyayilwa le nto ngokulungisa izinto ezikrelekrele ngamanye amaxesha, okanye ngokuyila indawo ukuze ibe nobukhulu obufanayo bodonga, nto leyo engasoloko isenzeka.
Eli linqanaba apho i-QSY's 30 iminyaka ekukhupheni ihlawula izabelo. Baqonda iinguqu ze-metallurgical, ukukhula kweenkozo, kunye nendlela yokulawula ubushushu ukunciphisa uxinzelelo olushiyekileyo. Imigaqo idluliselwa phakathi kotyalo-mali kunye MIM ukucula. Bayazi ukuba kwenzeka ntoni kwi-cobalt-chrome kwi-1300 ° C. Olo lwazi lweziko luthintela imililo emininzi yokulinga kunye neempazamo.
Ujongo lweNyaniso: Ukusetyenzwa kwangemva kunye neNtsomi yoMnatha
Nantsi imfihlo emdaka ye-MIM: Ubume bomnatha ligama lokuthengisa. Kumalungu amaninzi asebenzayo, ikufutshane ne-net-shape. Emva kokucoca, usoloko ufuna i-post-processing. Kuhlala kukho ilitha elikhanyayo lokuwa. Unyamezelo lweDimensional lunokuba +/-0.3% kwidimension ye-sintered, kodwa kwibhore ekufuneka ilingane ne-H7? Mhlawumbi uya kumatshini. I-EDM ingafuneka kwizinto ezincinci, ezichanekileyo eziphambukisayo.
Umphezulu ogqityiweyo ngokuthe ngqo ngaphandle kwesithando somlilo yi-matte, i-gray texture. Kwizicelo ezininzi, kulungile. Kwicandelo lokuphatha ulwelo olufuna indlela yokuhamba egudileyo, kuya kufuneka uyipolishi okanye uyipolishise. Oku kongeza iindleko kunye nexesha. Xa kuvavanywa MIM, kufuneka uqikelele lo msebenzi wesibini. Asikobuthathaka benkqubo; yinyani yobunjineli. Injongo kukuyinciphisa, ukufumana i-95% yejometri ekunene kwi-mold, ngoko ke ixesha lakho lokucoca i-CNC (kunye neendleko) kwindawo ebiza kakhulu ye-sintered incinci.
Le yi-synergy QSY leverages. Inxalenye iphuma kwiziko elitshisayo. I-QC yabo iyayijonga. Ukuba izinto ezimbalwa ezibalulekileyo zedatha kufuneka ziqiniswe, iya ngqo kwisebe labo le-CNC. Akukho kulibaziseka ngenqanawa, akukho myalelo omtsha wokuthenga, akukho mngcipheko weempazamo zonxibelelwano. Baphatha inxalenye ye-sintered njenge-pre-form, kwaye ubuchule babo bomatshini obuvela kwamanye amacandelo busebenza ngokuthe ngqo. Iguqula intsomi yokwakheka komnatha ibe yinkqubo yokwenziwa elawulwayo, esebenzayo enamanyathelo amabini.
Xa iMIM Isenza Ingqiqo (Kwaye xa Ingenzi)
Ke, emva kwayo yonke le nto, i-MIM ikhanya phi? Ayiyiyo yonke into. Iqaqambile kwivolume ephezulu, entsonkothileyo, incinci ukuya kwephakathi yentsimbi. Cinga ngezixhobo zompu, izixhobo zotyando, iibhokisi zegiya zedrone, iziqhoboshi ezintsonkothileyo. Amacandelo anokuba liphupha elibi ukuya kumatshini osuka eqinile, okanye apho utyalo-mali lungenako ukubamba iinkcukacha ezintle okanye iindonga ezibhityileyo. Uqoqosho lusebenza xa usenza amawaka, hayi amakhulu, ngenxa yezixhobo eziphambili kunye neendleko zophuhliso lwenkqubo.
Izabalaza ngamalungu amakhulu kakhulu (imilinganiselo yobungakanani beziko), iimilo ezilula kakhulu (ngoomatshini nje), okanye ngealloys ezithile ekunzima kakhulu ukuzifaka kuxinano oluphezulu. Kwakhona isenokungabi lolona khetho lulungileyo ukuba imathiriyeli yakho iyintsimbi ephantsi yekhabhoni ephantsi kwaye ufuna iziqwenga ezingama-500 kuphela; ukusika ngelaser kunye nokuwelda kunokuba sezantsi.
Undoqo kukuzibandakanya kwangethuba. Musa ukuthumela umzobo ogqityiweyo womatshini kwaye ucele i MIM caphula. Uyilo kufuneka luphuculwe kwinkqubo-iindonga ezifanayo, i-radii enesisa, ikhumbule isango kunye neendawo ze-ejector pin. Iqabane elilungileyo liyakwenza uphononongo loYilo lweMIM (DFM). Ukusuka kwinto endiyibonileyo yemisebenzi efana ne-QSY, olo hlaziyo lusekelwe kwisakhono sabo sokusebenza kwesinyithi esipheleleyo. Basenokucebisa indlela exutyiweyo: MIM undoqo ontsokothileyo wenxalenye, emva koko umatshini ujongano lokukhwelana ukusuka kwibar ekhandiweyo kwaye uyiqhoboshele okanye uyidibanise. Oko kukucinga okusebenzisekayo, okunamava.
I-MIM ayilonguquko ethatha indawo yonke. Sesinye isixhobo esinamandla kwibhokisi yokuvelisa. Ixabiso layo livulwa kungekuko ukuyibona njengommangaliso ozimeleyo, kodwa ngokuyidibanisa ekuqondeni okubanzi kweentsimbi, indlela eziziphatha ngayo, kunye nendlela yokuyibumba. Iivenkile ezifumana ngokufanelekileyo zizo, ezifana ne-QSY, ezihloniphayo lonke uhambo olusuka kwi powder ukuya kwinxalenye egqityiweyo, kwaye abanezibazi-kunye nempumelelo-ukusuka ekuhambeni loo ndlela ngokwenene.
